Unlock your Heat
Pump Journey

Heat Pumps Unlocked

We didn’t want this just to be another book based around the theory of heat pump system design, but something that blends these concepts with real-world design practices. Giving the ‘everyday’ engineer a simple, easy to follow way of taking the leap into designing heat pump systems in real life is our aim with this book.


We will show you the software we use everyday and add hints, tips and learnings that we hope will eventually lead to a standardised design practice across the UK.

Perfect for any
level of learning

Heat Pumps Unlocked is the perfect guide for all skill levels, simplifying heat pump technology with clear, practical insights.

Perfect for any
level of learning

Heat Pumps Unlocked is the perfect guide for all skill levels, simplifying heat pump technology with clear, practical insights.

About the Authors

Lewis Litherland

Lewis is currently the Training Manager at Heat Geek. Despite only being 33 at the time of writing, he has amassed a wealth of experience across many facets of the heating industry.

James Law

James is the Head of Domestic Heat Pump System Design & MCS Compliance at British Gas, and brings almost two decades of industry knowledge and experience to the table along with his unrivalled passion for the industry.

Supported By

“Heat Pumps Unlocked is a very timely and necessary contribution to the fossil fuel heating challenge in the UK”

Bean Beanland

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Follow the authors on Linkedin